Fountain pen



Aug. 27, 1929.` G w, GlLMAN 1,726,432

` FOUNTAIN PEN Filed Nov. 27, 1926 I 71 ve 77 i024 6601296 Il). v' 171101521 orivey Patented Aug. 27, 1929.

UNITED vSTATES. PATENT OFFICE. GEORGE WASHINGTON GILMAN, OF JANESVILLE, 't-TISCONSIN, ASSIGNCIR T0 (JAB/ONA` PEN CQMPANY, INC., OF JANEsVILLE, WISCONSIN, A CCRPORATION OF WISCONSIN.

FOUNTAIN PEN.

Application filed November 27, 1926. Serial No. 151,103.

The present invention relates to fountainV pens, and more particularly to pens of the self-filling variety, provided with ink bags and compressing means-for the same.

The purpose of compressing the ink bag is to drive out the air therefrom. This permits a new supply of ink to be sucked into the bag when it is returned to its normal shape. The compressing means usually comprises aleaf spring that is longitudinally disposed within the barrel and that is movable transversely thereof in one direction to compress the bag and in the opposite direction to release it.

As this transverse movement back and forth of the spring is made many times during the life of the fountain pen, it causes considerable wear of various parts at one or both ends of the barrel, and of the manipulating cams or other mechanisms. This wear shortens the life of the fountain pen. Furthermore, the connections betweenthe spring and itsmanipulating cams or other mechanisms are often quite complicated, increasing the tendency to such wear, causing the pen to get out of repair frequently, and enhancing the labor cost. f 1

It is therefore an object of the present invention to improve upon present-day pens of the above-described character, to the end that their construction may be simplified, their life of operation increased and their cost of manufacture reduced.

With this and other objects inview, the invention consists of the fountain pen apre ferred embodiment of whichl is hereinafter described, illustrated in the accompanying drawings and defined in "the appended claims.

In the accompanying drawings, Fig. 1 is an elevation of a pen constructed according to a preferred embodiment of the present invention; Fig. 2 is an enlarged longitudinal section of the same, taken upon the line 22 of Fig. 4, looking in the direction of the arrows; Fig. 3 is a section of various parts shown in Fig. 2, but omitting some `of the parts shown in Fig. 2 for clearance; Fig. 4 is a fragmentary section, taken upon the line 4-4 of Fig. 2, looking ink thedirection of the arrows; Fig. 5 isa section taken upon 4 the line 5-5 of Fig. 2, looking in the direction of the arrows; Fig. 6 is a fragmentary perspective of the ink-bag compressing spring; and Fig. Z is a section similarto Fig. 4 of va modification.

`v The barrel 2 of the fountain penis made of a tube and the ends of thev barrel are accordingly shown as open. The interior sidev faceof the barrel is shown at 4. One of the end faces 6 is provided with an opening 8. The diameter of thelopening is smaller'than the diameter of the interior face 4 of the barrel. An ink-bag 10 is disposed in the barrel and its open side is secured` in any wellknown way at the other end 12 of the barrel. The inkv bag is adapted to be compressed by a leaf spring 14 having intermediately 'l i secured thereto at an intermediate portion of the same a strip of metal 16. The ink bag 1s compressed when the spring is bowed out from the full-line to the dotted-line position `of Fig. 2, and becomes released when the spring is returned from the dotted to the full-line positionof the same gure.

,The pen 20 is carried in a slip section 22v that is simply slipped into the open end 12 stead of exerting a longitudinally extending thrust upon the slip section 22 tending to drive the same out of the barrel, engages merely the walls of the recess 26 and has no tendency to dislodge the slip section.

The actuationof the spring iseffected by a cam 28 acting upon a cooperating cam 30 upon the otherend of the spring. The ca1n28 is formed upon a tubular member32 of differing diameterv and is mounted upon a corren spondingly` shaped sleeve 34 of differing diameter separated by an annular shoulder 36. The sleeve 84 is fixed upon the barrel in a manner presently to bedescribed. The

tubular member 32 may be rotated about the p tends into the openingy 8 of the end face 6 andy is provided with a second annular shoulder 38 that contacts with the outer portion of the end face 6. A screw 40 extends through the sleeve and is threaded into a nut 42 that engages the interior of the end face 6. The parts are secured together between the nut and4 a heady 44. of the screw 40. The tubular member 32 is rotatably held in place between the annular shoulder 36 and the head 44. A covering member 46 is secured to the portion of smaller diameter of the tubular member 32 so as to rotate therewith, and to this end the said smaller portion of the tubular member `lmay be provided with teeth, corrugations, or

similar mechanism 48. In this manner the sleeve is rigidly secured to the end facev 6 of the barrel, but the cams 28 upon the tubular member'32 are freely rotatable in order to effect the longitudinal movement of the cam 80. The cams 28 may be such as to permit movement of the tubular member in one'direction only, as shown in Fig. 4, or in both directions,

`as shown in Fig. 7

plate-shaped member is reduced at one end.

58 to form the cam 30. The other end of the V plate-shaped member 56 is similarly reduced ait60 to' provide a recessand in this recess the end 54 of the spring 14 is secured.v ,The plateshaped member 56 thus provides a combined guide and cam, the guide sliding longitudinally in the alined recesses 52 and50.

A very simple construction is thus provided comprising a barrel in which the ink bag and the' compressing spring are contained, and a closure for the barrel at one end ofthe same in which the cams 28 for longitudinally actuating thefspring, are rotatably mounted about a portion thatisfiXed to the said end ofthe barrel. The closure contacts rotatably at the end 62 with the outer portion of the end face 6 and the cam 30 extends through the openings both in the end 6 of the barrel and the end ofthe closure that contacts therewith. The construction is such that a substantially straight spring 14 may be employed, as illustrated, except that one endy is bent `at 24 for the reasons above given, and the cam 30 isprovided j at the other end. `Because of. this straight construction, the spring will return with a sharpk click to its straight position after actuation by the-cams 28 and will main-` tain its shape without permanent buckling or bending. Such buckling, of course,would have a tendency to decrease the ink capacity of the bag 10.- The device is as simple as it is effective and requires very little repair and such repairs when necessary are very easily made.

It will, of course, be understood that the illustrated embodiment of the invention may be modified by persons skilled in the art without in any way departing from the spirit and scope of the invention as defined in the appended claims. f

What is claimed is l. A fountain lpen having, in combination, a tube constituting a barrel having an interior side face, a slip section in an end of the tube, the side face having a recess disposed opposite to a portion of the section, an ink bag in the'barrel, a spring in the barrel for compressing the bag, an end of the spring extending in between the side face and the section and into the recess, and means for actuating the spring to compress the bag.

2. A fountain pen having, in combination, a tube constituting a barrel having an interior side face, a section in an end of the tube, the' side face having a recess near the section, an ink bag in the barrel, a spring'in the barrel for compressing the ink bag, an end of the spring being bent into the recess, the recess having walls on both sides of the bent end of the spring to confine the said bent end of the spring in the recess, and means for actuating the spring `to compress the bag. f

3. A fountain pen having, in combination, a barrel having an interior side face and an end face and having a recess in the side face near the end face, an ink bag in the barrel, a spring in the barrel for compressing the inlr bag and having a bent portion extending into the recess, the recess having walls on bothsides ofthe bent end of the spring to confine the sai-d bent end of the spring in the recess, and means near the other end of th barrel for actuating'the spring.

4. A fountain pen having, in combination, a tube constituting a barrel having an interior side face and: two ends, a slip section in one end of the tube, the side face having a recess disposed opposite to a portion of the section, an ink bag inthe barrel, aspring in the barrel for compressing the bag, one end of the spring extending in between the side facerand the section and into the recess, the other end of the spring extending through the other end of the barrel, and means engaging the said other end of the spring for' actuating the spring to compress the bag.'

f5. A fountain'pen having, in combination, a barrelhaving interior side and end faces, an ink bag in thebarrel, a. closure having an end face, means extending through the end faces and engaging interior portions of the barrel and the closure to hold the closure and the barrel against separation and with the end ing an end extending through'the openings,

the closureibeing rotatable with respect tethe barrel, and means in the closure `controlled by the rotation of the closure for engaging the said end of the spring to actuate the spring to compress 'the bag. i

6. A fountain pen having, a barrel having interior side and end faces, the end face being provided With an opening, an ink bag in the barrel, a closure having an end face provided with an opening, the closure being mounted on the barrel With the end faces in contact, means extending through the openings 'and engaging interior portions of the barrel and the closure to hold the closure and the barrel against separation and With the end faces in contact, the said means having an'opening near the side face, a substantially straight spring positioned lin the barrel for compressing the ink bag having a longitudinally movable cam extending through the openings, the closure beingrotatable With respect to thebarrel, and a cam members being a barrel provided With lan interior side face and the other member being a closure, the said means and vthe vend faces having openings near the side face, an ink bag in the barrel, a substantially straight spring for compressing the ink bag positioned in the barrel and having a cam extending through the openings and being longitudinally movable to effect actuation of the bagcompressing means, and a cam in the closure and rotatable with theclosure and adapted to engage the first-named cam to effect longitudinal movement of the first-named cam.

8. A fountain pen having, in combination,

. a barrel having interior side and end faces,

the end face being provided With an opening, an ink bag in the barrel, a closure having an end face provided With an opening, the closure being mounted on the barrel with the end faces in contact, a sleeve in the closure eX- tending through the openings and having an opening, a nut 1n the barrel engaging the end face, a screw extending through the sleeve and threaded into the nut to hold the closure and the barrel against separation and With'the end faces in contact, a spring for compressing the ink bag being positioned in the barrel and having a cam extending through the openings, the cam being movable longitudinally of the barrel to effect actuation of the bag-compressing spring, the closure being rotatable With respect to the barrel` and a cam-in the closure and rotatable With the closure and adapted to engage the first-named cam toefin combination,

fect longitudinal' movement of the` firstnamed cam.`

9. A fountain pen having, in combination,

a barrel having an end face, an ink bag in the barrel, means for compressing the ink bag, the compressing means being positioned in the barrel and having a cam, a closure having an end face, the closure being mounted on the barrel With the end faces in contact, the cam` extending through the end faces and intonthe closure and being disposed substantially in contact With the interiorwalls of the barrel and the closure, the cam being movable longitudinally of the barrel and the closure While remaining in substantial Contact With the said interior Walls to effect actuation of the'bagcompressing means, means for` holding the closure against yseparation from the barrel While permitting rotation of the closure with respect to the barrel, and a cam secured to the interior Wall of the closure and rotatable 4 with the closure and adapted to engage the first-named cam to effect longitudinal movement of the first-named cam;

\ l0. yAleaf spring one end of which is bent and t-he `other end of which is provided-With a cam.

11. A" leaf. spring, anda plate-member guide, the thickness of theplate member being reduced at one' end to Vconstitute a cam and at the other end to` provide a recess, and an en'd of the spring being secured in the recess.

l2. A fountain pen having, in combination, a barrel having an interior side face and an end face and having a recess in the side face,an

ink bag in the barrel, a spring inthe barrel kfor compressing the ink bag and having a bent portion extending into the recess, the spring having a longitudinally movable cam, a closure mounted on the barrel near the end face and rotatable With respect to the barrel, and a cam rotatable With the closure to move the first-named cam longitudinally to effect actuation of the spring. Y

13. `A fountain pen having, in combination, tvvo members each having an end face and mounted yone upon the other with the end faces in contact and so as to be relatively rotatable, means extending through one ofthe end faces and into the other end face to hold the members against separation, one of the members being a barrel having an interior side face provided with a recess and the other member beingia closure, an inky bag in the barrel, a

spring for compressing the ink bag positioned 14. A fountain pen having, in combination, a barrel having an interior side face and an end-face and having a recess in the side face, an ink bag in the barrel, a spring in the barjrel for compressing the ink bag and having a bent portion extending into the recess, theI springhaving also a guide member and a longitudinally movable cam. a closure mounted on the barrel near the end face and rotatable with respect to the barrel, and a cam rotatable with the closure .to move the firstnained cam longitudinally to eHect actuation of the spring, the pen having a guide in which the guide member is received to guide the spring during its actuation.

15. Afountain pen having, in combination, two members each having an end face and mounted one upon the other with the end faces in contact and so as tobe relatively 202 rotatable, means extending through' one of annular shoulder in contact with the exterior ythe end faces, and into the other end face to hold the members against separation, the said means having a guide, one of the members being a barrel having an interior side face 1x provided with a recess and the other member eing a closure, an ink bag in the barrel, a spring for compressing the ink bag positioned in the barrel and having acombined guide member and cam received within the guide and extending through the end faces andK into theclosure, thecam being longitudinally movable in the guide to effect actuation of the bag-'compressing means, the spring having aso. a bent portion extending into the recess, and a cam in the closure and rotatable with thefclosure and adapted to en-A gage the first-named cam to effect longitudinal movement of the first-named cam.

16. A closure having, in combination, a sleeve` provided with portionsv of different diameter separated by an annular shoulder, a tubular member having port-ions of correspondingly different diameter rotatably mounted about the sleeve and having a cam, a screw extending through the :sleeve and adapted to be threaded into a nut, the screw having a head between which and the annular shoulder the tubular member is rotably held, and a covering secured to the tubular member and rotatable therewith. v

17.. A fountain pen having, in combination, a barrel having an end face provided with an opening, an ink bag in the barrel, means for compressing the ink bag, the compressing means being positioned in the barrel and having a` cam, the cam being movable longitudinally of the barrelvto effect actuation of the bag-compressing means, a sleeve provided with portions of different diameter separated by an annular shoulder and having a second annular shoulder, t-he sleeve extending into the yend-face openincr with the second of the end face, a tubular member having portions of correspondinglyk diEerent diam-f eter rotatably mounted aboutthe sleeve, the portion of a larger diameter of the tubular member having a cam for engaging the compressingameans cam, a nut engaging the sleeve andnbetween which and the second annular shoulder the end face is confined, a screw extending through the sleever and threaded into the nut t0 hold the sleeve, nut` e and the barrel together, the screw having a head between which and the annular shoulder the tubular member is rotatably held, thev sleeve and the nut having alined openings constituting a guide for the compressing means cam'and vthrough which theccompress ing-means cam extends into engagement with the tubulanmember cam, and a` covering for the tubular member and rotatable therewith.

18. A spring the body ofk which is substantially straight, one endof the spring being bent and the other end being provided with a cam. r 19. A closure having, in combination, al

is rotably held, andmeans cooperating with the member to hold the sleeveand the tubular member together. l i

20. A fountain pen having, in combination;

a hollow barrel having la recess with a shoul der in the innerwall near one end; an ink bag in the barrel; a bag compressing spring inthe barrel at the'side of the ink bag having one end bent outwardly and lying in said re 'cess with its end against said shoulder; andV means for moving the otherend of the spring to bow the same to compress theink bag.

21. A fountain pen having, in combination; a hollow barrel having an undercut recess with a shoulder in the inner wall nearone end, an ink bag in the barrel; a bagcompressing spring in thel barrel at the side of the ink bag having one end bent outwardly and lying in said recess with its end against said shoulder; and meansV for moving the other end of the spring to'bow the same to compress the ink bag. f y

22. A fountain pen having, in combination1 a barrel, an ink bag in the barrel, a leaf spring in the barrel at one side of the ink.

bag for compressing the ink bag', co-operating guide means on the barrel and the leaf spring at one end of said spring, and a cam on the end of the leaf spring adjacent said guide means.

In testimony whereof, I havehereuntosub scribed my name.

Giionen v'vAsiiiNeioN GiLMAN.

iio`

CERTIFICATE OF CORRECTION.

Patent No. 1,726,432. Granted August 27, 1929, to

GEORGE WASHINGTON GILMAN.

It is hereby certified that the name of the assignee in the above numbered patent was erroneously written and printed as "Carena Pen Company, Inc.", whereas said name should have been written and printed as "Corona Pen Company Inc.", as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this lst day of October, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

